JPH04128818U - injection mold - Google Patents

Abstract

(57) [Summary] [Purpose] In an injection mold with a core pin on the fixed side template, the injection molded product does not wrap around the core pin when the mold is opened, and molding can be easily performed without deformation. do. [Configuration] Coil spring 4 built into fixed side template 3
Due to the spring force, the injection molded product 6 is pushed out from the core pin 1 by the sleeve 5 when the mold is opened. Thereby, the injection molded product 6 is pressed against the movable side template 2, and the injection molded product 6 can be ejected on the movable side.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed to prevent the molded product from deforming when the mold is opened. This invention relates to an injection mold that can perform molding without any problems.

0002

[Conventional technology]

Conventionally, the core pin on the fixed side had a draw taper. This is when the mold opens This prevents the molded product from wrapping around the core pin and deforming it.

0003

[Problem that the idea aims to solve]

However, with conventional injection molding molds, even where a straight hole is required, the molded product may deform. There was a problem in that a tapered hole was required to prevent this. Therefore, the purpose of this invention was to solve the conventional problems by creating a punching tape. To obtain an injection mold that can be easily produced by injection molding without using a machine. It's there.

0004

[Means to solve the problem]

In order to solve the above problem, this idea was developed for the core pin on the fixed side of the injection mold. Uses a sleeve to eject the molded product and a coil spring to actuate the sleeve. There is. This allows production without the molded product being deformed when the mold is opened during injection molding. We made it possible to achieve this.

[0005]

[Effect]

In the injection mold structure configured as above, when the mold is clamped, the movable side mold The plate pushes the sleeve into place on the fixed side. After injection molding, at the same time as the mold opens, the force of the coil spring moves the molded product to the movable side. It operates as if being pushed.

[0006] This allows the molded product to separate from the core pin without being deformed.

[0007]

【Example】

An embodiment of this invention will be described below based on the drawings. FIG. 1 is a sectional view showing injection molding using the injection mold of the present invention. The core pin 1 is pushed into the stationary mold plate 3 by the movable mold plate 2 during mold clamping. It will be done. A molded product 6 is molded on the side where the movable template 2 is located. The coil spring 4 is The tube 5 is pressed against the side where the movable mold plate 2 is located.

[0008] FIG. 2 is a partial sectional view of the tip of the core pin when the mold is opened. Receive at the same time as mold opening The coil spring 4 housed in the plate 7 causes the sleeve 5 to protrude. As a result, the molded product 6 is pulled out from the core pin 1 and pressed against the movable side template 2. This means that the molded product can be moved completely to the movable side.

[0009]

[Effect of the idea]

As explained above, this idea allows for small molded products to be straight-lined on the fixed side. When applied to a mold that needs to form a hole, and when wrapped around the core pin 1. If there is no space for installing a device to press the product onto the movable template 2, This has the effect of preventing molded products from deforming and downsizing the mold.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a cross section of an injection mold structure of the present invention.

FIG. 2 is a partial cross-sectional view of the tip of the core pin 1 when the mold is opened.

[Explanation of symbols]

1 core pin 2 Movable side template 3 Fixed side template 4 Coil spring 5 Sleeve 6 Molded products 7 Receiver plate

Claims (1)

[Scope of utility model registration request] Claim 1: In an injection mold in which a core pin is provided on a stationary side template to form a hole in a molded product, the sleeve is incorporated in the stationary side template, and the sleeve is moved toward the movable side template. An injection mold comprising: a pressure member that applies pressure; and a movable mold plate having a receiving portion for receiving the pressure member.